What is Anal Sphincter?
1.
The butt muscle that cuts off your poop and keeps the rest of your poop in your bung.
My anal sphincter is so lose that I can't feel myself poop anymore.
See
2.
Some would say quite similar to the asshole, the anal sphincter is like a little drawstring that loosens and tightens up your asshole when things are coming in and out of it.
My grandma has shit constantly flowing out of her asshole, she must have a problem with her anal sphincter.
